Depart from the car park in the hamlet of La Caire (Malemort road) in the commune of Lus-la-Croix-Haute.
(S/E) From the entrance to the hamlet, turn left towards the bottom of the hamlet via the Malemort road. Just before the Ruisseau de l'Étroit stream, take a path on the right. The stream is on your left. Follow the Toussière gorges. Cross a footbridge. At the fork, turn right to cross the Ruisseau des Côtes stream.
(1) You will reach the ruins of the Templar Commandery, which are currently being restored. Continue along the path.
(2) Take the path on the right after crossing the Ruisseau de l'Étroit. The path climbs gently. At the fork, turn right.
(3) Cross another stream and take the path on the right.
(4) Pass the ruins of old houses in Toussièrette and continue on.
(5) At the fork, take the path on the right to return to the hamlet of La Caire (S/E).
You do need to pay attention at point number 5 and make sure you don't miss the fork to the right to go back down to the car park.